const fs = require('fs')

let data = fs.readFileSync('../files/chengji.txt','utf8')
// let data = fs.readFileSync('../files/chengji.txt','utf8')
// let data = fs.readFileSync('../files/chengji.txt','utf8')
console.log(data)

let err = fs.writeFileSync('../files/4.txt','writeFileSync')
// let err = fs.writeFileSync('../files/4.txt','writeFileSync')
// let err = fs.writeFileSync('../files/4.txt','writeFileSync')
console.log(err)